Charging pile DC power distribution method and system based on chaotic topology

Abstract

The present invention discloses a charging pile DC power distribution method based on chaotic topology. According to user needs, an initial chaotic topology distribution network for charging pile power is established based on a matrix topology network. Through a Gaussian kernel function, the dimension of the initial chaotic topology distribution network for charging pile power is expanded to a high-dimensional surface to obtain a charging pile power chaotic topology distribution network with multiple charging nodes. Then, based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power orientation output by the power conversion unit. In this way, efficient power flexible scheduling can be achieved, and the degree of freedom of all nodes in the power topology can be arbitrarily customized to ensure that each node can achieve the efficiency expected by the user.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a method and system for distributing direct current power of a charging pile based on chaotic topology. Background Art

[0002] After starting charging, the charging pile's controller first requests charging data from all vehicles to be charged. The charging pile dynamically calculates each vehicle's required power based on the output capacity of its own power unit, dynamically adjusting each vehicle's real-time output power. During charging, the charging pile continues to calculate each vehicle's required power in real time to avoid redundant activation and allocation of power units. Adopting an optimal power routing topology can improve the utilization efficiency of power modules, while reducing equipment production costs, shortening vehicle charging times, and improving the user charging experience. Currently, mainstream power routing topologies include linear, ring, star-ring, and matrix distribution. However, all of these topologies suffer from low power utilization or blind spots in overcharging power distribution, and lack the flexibility to individually customize certain node degrees of freedom.

[0003] Based on this, a new solution is needed. Summary of the Invention

[0004] The main purpose of the present invention is to provide a charging pile DC power distribution method based on chaotic topology to address the problems of low power utilization, supercharging power distribution blind spots and inability to flexibly customize node freedom in existing power routing topologies.

[0005] To achieve the above object, the present invention provides a charging pile DC power distribution method based on chaotic topology, comprising the following steps:

[0006] According to user needs, establish an initial chaotic topology distribution network for charging pile power based on a matrix topology network; and

[0007] By using a Gaussian kernel function, the dimension of the initial chaotic topological distribution network of the charging pile power is expanded to a high-dimensional surface, thereby obtaining a charging pile power chaotic topological distribution network having multiple charging nodes, wherein each charging node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between the nodes having a connection relationship;

[0008] Based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power direction output by the power conversion unit.

[0009] In the chaotic topology-based charging pile DC power distribution method provided by the present invention, according to user needs, the steps of establishing a two-dimensional initial charging pile power topology network based on a matrix topology network include:

[0010] Based on the number and arrangement requirements of charging guns input by the user, a charging pile power matrix topology distribution network is established. The charging pile power matrix topology distribution network includes multiple planar matrix nodes, each node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between adjacent matrix nodes;

[0011] The plane matrix node selected by the user is freely edited, and a contactor switch unit is set between the plane matrix node selected by the user and one or more of the remaining plane matrix nodes to establish a connection relationship, thereby forming the two-dimensional initial charging pile power topology network.

[0012] In the chaotic topology-based charging pile DC power distribution method provided by the present invention, the steps of expanding the dimension of the initial chaotic topology distribution network of the charging pile power to a high-dimensional surface by using a Gaussian kernel function to obtain a charging pile power chaotic topology distribution network with multiple charging nodes include:

[0013] Utilizing the Gaussian kernel function, the dimension of the initial chaotic topology distribution network of the charging pile power is expanded;

[0014] According to the maximum degree of freedom of the charging node, the dimension of the initial chaotic topology distribution network of the charging pile power is reduced to obtain the chaotic topology distribution network of the charging pile power.

[0015] In the chaotic topology-based charging pile DC power distribution method provided by the present invention, the steps of controlling the power direction output by the power conversion unit by controlling the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun, and the power distribution strategy include:

[0016] After one of the plurality of charging guns is started, disconnecting a contactor switch unit directly connected to the started charging gun, and inputting power from a power conversion unit connected to the started charging gun to the started charging gun;

[0017] When the power of the power conversion unit connected to the started charging gun is less than the required power of the started charging gun, the charging pile power chaotic topology distribution network is searched to see whether there is an idle power conversion unit among the power conversion units connected to the charging node where the started charging gun is located. When an idle power conversion unit is found, the contactor switch unit between the charging node where the idle power conversion unit is located and the charging node where the started charging gun is located is closed, and the power of the idle power conversion unit is input to the started charging gun.

[0018] The chaotic topology-based charging pile DC power distribution method provided by the present invention also includes: when the sum of the power of the power conversion unit connected to the started charging gun and the power of all idle power conversion units is less than the required power of the started charging gun, searching the charging pile power chaotic topology distribution network for a second type of power conversion unit among the power conversion units connected to the charging node where the occupied power conversion unit is located, the second type of power conversion unit is occupied by other charging guns and has a lower utilization rate than the power conversion unit occupied by the started charging gun. When the second type of power conversion unit is found, the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the started charging gun is located is closed, and the power of the second type of power conversion unit is input to the started charging gun.

[0019] According to another aspect of the present invention, a charging pile DC power distribution system based on chaotic topology is provided, comprising:

[0020] An initial chaotic topology distribution network establishment module is used to establish an initial chaotic topology distribution network for charging pile power based on a matrix topology network according to user needs; and

[0021] A dimensionality expansion module, configured to expand the dimension of the initial chaotic topological distribution network of the charging pile power to a high-dimensional surface using a Gaussian kernel function, thereby obtaining a charging pile power chaotic topological distribution network having a plurality of charging nodes, wherein each charging node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between the connected nodes;

[0022] A control module is used to control the power direction output by the power conversion unit by controlling the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy.

[0023] According to yet another aspect of the present invention, a charging pile is further provided, comprising the charging pile DC power distribution system based on chaotic topology as described above.

[0024] According to another aspect of the present invention, a charging pile DC power distribution device based on chaotic topology is also provided, including a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the charging pile DC power distribution method based on chaotic topology are implemented as described above.

[0025] The charging pile DC power distribution method based on chaotic topology provided by the present invention has the following beneficial effects: the present invention proposes a charging pile DC power distribution method based on chaotic topology, and establishes an initial chaotic topology distribution network for charging pile power based on a matrix topology network according to user needs; through a Gaussian kernel function, the dimension of the initial chaotic topology distribution network for charging pile power is expanded to a high-dimensional surface to obtain a charging pile power chaotic topology distribution network with multiple charging nodes; then, based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power direction output by the power conversion unit; thereby, efficient power flexible scheduling can be achieved, and the degrees of freedom of all nodes in the power topology can be arbitrarily customized to ensure that each node can achieve the efficiency expected by the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work.

[0027] Figure 1 FIG2 is a flow chart of a method for distributing DC power to a charging pile based on chaotic topology according to an embodiment of the present invention;

[0028] Figure 2 The figure shows the charging pile power matrix topology distribution network established according to user needs;

[0029] Figure 3 The figure shows the expanded charging pile power matrix topology distribution network. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate exemplary embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] Figure 1FIG. 1 is a flow chart of a method for distributing DC power to a charging pile based on chaotic topology according to an embodiment of the present invention. Figure 1 As shown, the charging pile DC power distribution method based on chaotic topology provided by the present invention includes the following steps:

[0033] Step S1: Establishing an initial chaotic topology distribution network for charging pile power based on a matrix topology network according to user needs;

[0034] Specifically, in one embodiment of the present invention, first, according to user needs, the number and coding of charging guns that the user wants to set in the system are confirmed and these charging gun nodes are distributed on the nodes of the matrix grid for initialization, such as Figure 2 As shown in the figure, a matrix grid is built according to user needs, which includes 16 charging guns. Then, in the matrix topology network of charging guns, the user selects the charging gun node with higher degree of freedom among all the above nodes, where the degree of freedom refers to the number of other nodes that the node can connect to. For example, Figure 2 In the example shown, the degree of freedom of the node where charging gun 13 is located is 4, the degree of freedom of the node where charging gun 1 is located is 2, and the degree of freedom of the node where charging gun 2 is located is 3. Finally, according to the user's choice, the degree of freedom of the node where the charging gun is located is edited, that is, a bridge node is added from the node to the more distant node. Increasing the number of bridge nodes means increasing the degree of freedom. The edited kilometer topology is shown in Figure 3. The degree of freedom of the node where charging gun 13 is located is 7, the degree of freedom of the node where charging gun 1 is located is 3, and the degree of freedom of the node where charging gun 2 is located is 5. Therefore, step S1 includes:

[0035] Based on the number and arrangement requirements of charging guns input by the user, a charging pile power matrix topology distribution network is established. The charging pile power matrix topology distribution network includes multiple planar matrix nodes, each node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between adjacent matrix nodes;

[0036] The plane matrix node selected by the user is freely edited, and a contactor switch unit is set between the plane matrix node selected by the user and one or more of the remaining plane matrix nodes to establish a connection relationship, thereby forming the two-dimensional initial charging pile power topology network.

[0037] As a result, the matrix-based chaotic power routing topology solution has been preliminarily completed. The chaotic power routing topology solution has no fixed shape. It deforms according to user customization needs and has free connection methods. Therefore, efficient power flexible scheduling can be achieved. The freedom of all nodes in the power topology can be arbitrarily customized to ensure that each node can achieve the efficiency expected by the user.

[0038] Step S2: Using a Gaussian kernel function, the dimension of the initial chaotic topological distribution network of the charging pile power is expanded to a high-dimensional surface to obtain a charging pile power chaotic topological distribution network having multiple charging nodes, wherein each charging node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between the nodes having a connection relationship;

[0039] Specifically, in one embodiment of the present invention, two-dimensional matrix nodes can be directly linearly classified in two-dimensional space. However, under the condition that it is unknown which boundaries the user may edit, we will not be able to directly classify the new topology on the two-dimensional plane. Therefore, it is necessary to expand the dimension of the new topological model to a high-dimensional surface to achieve the characteristics of linear separability and path tracking in high dimensions. Therefore, step S2 includes:

[0040] Step S21: using the Gaussian kernel function to perform dimension expansion on the initial chaotic topology distribution network of the charging pile power;

[0041] Specifically, in one embodiment of the present invention, a Gaussian kernel function is used as a feature mapping vector, and the Gaussian function expression is:

[0042] e -δ||x -y ||2

[0043] The Gaussian kernel function is used to map the nodes where all power conversion units are located. The mapped vector is expressed as:

[0044]

[0045] In order to achieve higher-dimensional expansion, after Taylor expansion of the Gaussian kernel, the mapping function can be further expressed as:

[0046]

[0047] After expansion, the vector expression can be obtained as follows:

[0048]

[0049] At this point, the two-dimensional coordinate system of x and y has been successfully elevated to a high-dimensional space of infinite dimensions. The chaotic topological power routing model can be linearly separable in the high-dimensional space. The chaotic topological system is expanded from the two-dimensional space to a multi-faceted matrix topological model in the high-dimensional space. In this high-dimensional curved space, all the contactor switch unit connections have no overlap, and the routes between the power conversion units are independent and separable.

[0050] Step S22: performing dimensionality reduction processing on the initial chaotic topology distribution network of charging pile power after dimension expansion according to the maximum degree of freedom of the charging node to obtain the chaotic topology distribution network of charging pile power.

[0051] Specifically, in one embodiment of the present invention, the amount of calculation in the high-dimensional surface space is large. Therefore, in order to meet the requirements of linear separability and the limitation of controllable calculation amount, we need to perform dimensionality reduction processing based on the maximum degree of freedom of the charging node. For example, Figure 3 In the embodiment shown, the maximum degree of freedom (number of outward connections) of a node is 7. We only need to expand it to a 7-dimensional space to meet the requirements. The specific approach of the present invention is to retain 6 levels of the Gaussian kernel function after Taylor expansion, and design the weights of all subsequent levels to be 0.

[0052] In this embodiment, after the chaotic topology power distribution split is dimensionally upgraded and then dimensionally reduced, it continues to distribute power in a matrix manner, thereby solving the problem of consistency in power distribution strategies for all chaotic models.

[0053] Step S3: Based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power direction output by the power conversion unit.

[0054] Specifically, in one embodiment of the present invention, after generating a chaotic topology distribution network for charging pile power, the power requirements of all charging guns are input. Subsequently, the power routing network state is adjusted based on whether each charging gun is enabled and the system's charging distribution strategy, outputting the power required by the charging guns.

[0055] Specifically, after a charging gun is started, the contactor switch unit directly connected to the started charging gun is first disconnected, and the power of the power conversion unit connected to the started charging gun is input to the started charging gun. Furthermore, since the power requirements of each charging gun are different, the power input by a single power conversion unit may not be able to meet its requirements. That is, when the power of the power conversion unit connected to the started charging gun is less than the power required by the started charging gun, it is necessary to connect other power conversion units in the charging pile power chaotic topology distribution network to provide it with power. Therefore, step S3 includes:

[0056] After one of the plurality of charging guns is started, disconnecting a contactor switch unit directly connected to the started charging gun, and inputting power from a power conversion unit connected to the started charging gun to the started charging gun;

[0057] When the power of the power conversion unit connected to the activated charging gun is less than the required power of the activated charging gun, searching the charging pile power chaotic topology distribution network for an idle power conversion unit among the power conversion units connected to the charging node where the activated charging gun is located. When an idle power conversion unit is found, closing the contactor switch unit between the charging node where the idle power conversion unit is located and the charging node where the activated charging gun is located, and inputting the power of the idle power conversion unit to the activated charging gun;

[0058] When the sum of the power of the power conversion unit connected to the started charging gun and the power of all idle power conversion units is less than the required power of the started charging gun, the charging pile power chaotic topology distribution network is searched to see whether there is a second type of power conversion unit among the power conversion units connected to the charging node where the occupied power conversion unit is located. The second type of power conversion unit is occupied by other charging guns and has a lower utilization rate than the power conversion unit occupied by the started charging gun. When the second type of power conversion unit is found, the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the started charging gun is located is closed to input the power of the second type of power conversion unit into the started charging gun.

[0059] The present invention also provides a charging pile DC power distribution system based on chaotic topology, including: an initial chaotic topology distribution network establishment module, which is used to establish a charging pile power initial chaotic topology distribution network based on a matrix topology network according to user needs; and a dimension expansion module, which is used to expand the dimension of the charging pile power initial chaotic topology distribution network to a high-dimensional surface through a Gaussian kernel function to obtain a charging pile power chaotic topology distribution network with multiple charging nodes, wherein each charging node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between the nodes with a connection relationship; a control module, which is used to control the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy to control the power direction output by the power conversion unit.

[0060] An embodiment of the present invention further provides a charging pile DC power distribution device based on chaotic topology, which may include:

[0061] memory for storing computer programs;

[0062] The processor, when used to execute the computer program stored in the above-mentioned memory, can implement the following steps:

[0063] According to user needs, an initial chaotic topology distribution network for charging pile power is established based on a matrix topology network; through a Gaussian kernel function, the dimension of the initial chaotic topology distribution network for charging pile power is expanded to a high-dimensional surface to obtain a charging pile power chaotic topology distribution network with multiple charging nodes, wherein each charging node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between the nodes with a connection relationship; based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power direction output by the power conversion unit.

[0064] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0065] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0066] Furthermore, those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination.

[0067] It should be noted that the above embodiments illustrate rather than limit the invention, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising several different elements and by means of appropriately programmed computers. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

Claims

1. A method for distributing DC power of charging piles based on chaotic topology, characterized in that: The following steps are involved: According to user needs, an initial chaotic topology distribution network for charging pile power is established based on a matrix topology network; By using a Gaussian kernel function, the dimension of the initial chaotic topological distribution network of the charging pile power is expanded to a high-dimensional surface, thereby obtaining a charging pile power chaotic topological distribution network having multiple charging nodes, wherein each charging node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between the nodes having a connection relationship; Based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy, the closing and opening of the contactor switch unit are controlled to control the power direction output by the power conversion unit; According to user needs, the steps of establishing a two-dimensional initial charging pile power topology network based on the matrix topology network include: Based on the number and arrangement requirements of charging guns input by the user, a charging pile power matrix topology distribution network is established. The charging pile power matrix topology distribution network includes multiple planar matrix nodes, each node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between adjacent matrix nodes; Freely edit the plane matrix node selected by the user, and set a contactor switch unit between the plane matrix node selected by the user and one or more of the remaining plane matrix nodes to establish a connection relationship to form the two-dimensional initial charging pile power topology network; The steps of controlling the power direction output by the power conversion unit by controlling the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy include: After one of the multiple charging guns is started, disconnecting a contactor switch unit directly connected to the started charging gun, and inputting power from a power conversion unit connected to the started charging gun to the started charging gun; When the power of the power conversion unit connected to the activated charging gun is less than the required power of the activated charging gun, searching the charging pile power chaotic topology distribution network for an idle power conversion unit among the power conversion units connected to the charging node where the activated charging gun is located. When an idle power conversion unit is found, closing the contactor switch unit between the charging node where the idle power conversion unit is located and the charging node where the activated charging gun is located, and inputting the power of the idle power conversion unit to the activated charging gun; It also includes: when the sum of the power of the power conversion unit connected to the started charging gun and the power of all idle power conversion units is less than the required power of the started charging gun, searching in the charging pile power chaotic topology distribution network whether there is a second type of power conversion unit among the power conversion units connected to the charging node where the occupied power conversion unit is located, the second type of power conversion unit is occupied by other charging guns and has a lower utilization rate than the power conversion unit occupied by the started charging gun. When the second type of power conversion unit is searched, the contactor switch unit between the charging node where the second type of power conversion unit is located and the charging node where the started charging gun is located is closed, and the power of the second type of power conversion unit is input to the started charging gun.

2. The method for distributing DC power of a charging pile based on chaotic topology according to claim 1, characterized in that: The steps of expanding the dimension of the initial chaotic topological distribution network of the charging pile power to a high-dimensional surface by using a Gaussian kernel function to obtain a chaotic topological distribution network of the charging pile power with multiple charging nodes include: Utilizing the Gaussian kernel function, the dimension of the initial chaotic topology distribution network of the charging pile power is expanded; According to the maximum degree of freedom of the charging node, the dimension of the initial chaotic topology distribution network of the charging pile power is reduced to obtain the chaotic topology distribution network of the charging pile power.

3. A charging pile DC power distribution system based on chaotic topology, used in the charging pile DC power distribution method based on chaotic topology according to claim 1 or 2, characterized in that: include: The initial chaotic topology distribution network establishment module is used to establish the initial chaotic topology distribution network of charging pile power based on the matrix topology network according to user needs; as well as A dimensionality expansion module, configured to expand the dimension of the initial chaotic topological distribution network of the charging pile power to a high-dimensional surface using a Gaussian kernel function, thereby obtaining a charging pile power chaotic topological distribution network having a plurality of charging nodes, wherein each charging node is provided with a charging gun and a power conversion unit connected to the charging gun, and a contactor switch unit is provided between the connected nodes; A control module is used to control the power direction output by the power conversion unit by controlling the closing and opening of the contactor switch unit based on the charging pile power chaotic topology distribution network, the required power of each charging gun and the power distribution strategy.

4. A charging pile, characterized in that: The charging pile includes the charging pile DC power distribution system based on chaotic topology as described in claim 3.

5. A charging pile DC power distribution device based on chaotic topology, characterized in that: The method comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the charging pile DC power distribution method based on chaotic topology as claimed in claim 1 or 2 are implemented.

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